I am aware of $79.95 on ebay delivered and similar on Amazon (currently $74 for me). I can use gift card for 5% off either of these.
I would be happy with second hand as long as it works.
Seems like I will also need a cage to hold it (e.g. Ulanzi V2 Vlog Case ~$15+) and a microphone to plug into it. Is there a 'kit' that has everything?
I didn’t find a cheaper alternative. I did buy the cage with the adapter on the bottom and am not really comfortable with bending the adapter cable to make it fit. I suggest going with an alternative that has the adapter on the top.